EXPERIMENTS TO PRODUCE SULPHATE OF SODA, &C 



117 



Sulphate of magnefia, 

 Muriate of foda, 

 Ammoniacal carbonate 



XII. 



Account offome Experiments performed upon a Scale of confider- 

 able Magnitude, and principally by the Agency of Frofi, to pro- 

 duce Sulphate of Soda, Carbonate ofMagnefia, and Muriate of 

 Ammonia, from Sidphate ofMagnefia, Carbonate of Ammonia, 

 and Muriate of Soda. By H. Campbell, M. D. From 

 the Author. 



JL HE felecled faline fubftances were, Epfom fait, or the ful- Sulphate of mag- 

 phate of magnefia; table fait, or the muriate of foda ; and fofanvt^ulpb. 

 concrete hartfhorn drops, or ammoniacal carbonate. Of the foda and mur. 

 proper mixtures, calculation was formed upon a fuppofed ac- mag * To tJ 

 quaintance with the table of agents entering into the compofi- carbonate ofam- 

 tion of each body. 



TABLE. 

 Acid. 



33 fulphuric 

 52 muriatic 

 45 carb. acid 

 The expected and unavoidable products were, 



Acid. Alkali. 



Glauber falts, or fulphate of foda, 



containing - - - - 27 fulph. 15 magn. 

 Salited or muriated magnefia, con- 

 taining - - - - 34 mur. 41 — * 

 And upon the addition of the ammoniacal carbonate to the 

 falited magnefia, 



Carbonate of magnefia - - 30 carbon 48 earth 22 

 Muriate of ammoniac - - 52 — 40 — 8 



The falited magnefia mull only be confidered as an interme- 

 diate product. 



To avoid the detail of various experiments, thofe found to 

 be molt practicable will be only related, connected with the 

 moil practicable apparatus. 



In iron pans of 1 50 gallons each, due proportions of fulphate Detail of the 

 of magnefia and muriate of foda were put in water in propor- ^P" 11112 ' 11, 

 tion to the laws of folubility and cryltallization. The faline 

 liquor was pumped into troughs lined with tinned iron plate. 

 The troughs were thirty {eet long, one foot wide, and three 



inches 



Water. 



58 



25 



